<% logger.debug "mat_sum start" %>
    <tr><td colspan=3><b>Skills:</b></td></tr>
    <%= render :partial => "material", :collection => material_sum.skills.values %>

    <tr><td colspan=3>&nbsp;</td></tr>
    <tr><td colspan=3><b>Minerals:</b></td></tr>
    <%= render :partial => "material", :collection => material_sum.minerals.values %>
    
    <tr><td colspan=3>&nbsp;</td></tr>
    <tr><td colspan=3><b>Components:</b></td></tr>
<% logger.debug "mat_sum end" %>
    <%= render :partial => "material", :collection => material_sum.components.values %>
